EEL 4744—Spring 2007
Dr. Eric M. Schwartz
Department of Electrical & Computer Engineering
10 April 2007
noise making devices.
of the test papers.
If you need more room, make a clearly indicated note on the front of the
page, "MORE ON BACK", and use the back.
The back of the page will
be graded without an indication on the front.
You may use any of the approved class textbooks or Motorola manuals.
use any notes (mine or yours),
examples, homework, labs, books, or calculators.
Be sure your exam consists of
If you separate your exam pages, put your name at the top of
follow the instructions
You must pledge and sign this page in order for a grade to be assigned.
In programs, the use of comments may result in
The point values for problems may be changed at prof’s discretion.
The space provided does
necessarily represent the amount of writing necessary.
Part of your grade on tests, quizzes, labs, etc. is based not only on solving the problem you are presented with, but the
manner in which you solve it.
For example, there is a difference between two programs that meet the given specifications,
but one is an elegant, extensible 20-line solution, while the other is an obfuscated 100-line program that also meets the
specifications but would be difficult to extend later.
Just as your future employer would value the latter program less than
the first, so will I in grading your assignments.
This exam counts for
% of your total grade.
Unless otherwise stated assume the following:
The oscillator frequency is precisely 4MHz.
The code should run on a 68HC12B32 with 64k
of external RAM and
the D-Bug4744 monitor, but with the internal EEPROM, RAM and Registers of your
You may assume all internal register equates (at $0000–$01FF) are
PORTT equ $00AE
are all the bit equates that you may need using the standard I have used in class and on the posted web
BIT0 equ %00000001, BIT76 equ %11000000, INV7 equ %01111111
On my honor as a University of Florida student, I certify that I have neither given
nor received any aid on this examination, nor I have seen anyone else do so.
PRINT YOUR NAME
SIGN YOUR NAME
10 Apr 07
Regrade comments below.
Give page # and problem # and reason for the petition.